Hi, I currently have a set of alloy wheels with an alchemy ORC rear hub but was wondering how the stiffness and quality of the wheel would change if I have the wheel rebuilt with a powertap G3? The reason I'm asking is because I'm really hard on wheels and have ruined several sets over the years. I weigh 200lbs and ride on many broken Tarmac.

The flange spacing on the G3 is much narrower than the ORC. This will make the wheel much softer from a lateral aspect. At your weight, I'm not sure it would be the best idea. What kind of rims are you on right now?

center to NDS should be 1.0mm according to your measurements.the center to DS is much more telling. at 2mm difference, that's huge. the NDS spoke tension will be a higher percentage of the DS spoke tension with the Alchemy.

The G3s are much better than the old Powertaps, but worse than the ORC, which has some of if not the best dimensions on the market. Whether a G3/Ardennes build is acceptable to you will probably depend on spoke count.

I know money is an issue but why on earth would you rebuild? ORC is an expensive hub so you will lose money even if you re-sell at a good price. Then you have to pay for new spokes, a G3 and a rebuild. Better to build an entirely new PT wheel with a rim and spoke count to suit your riding. If you find yourself never using the ORC wheel, sell that intact.

I think you must not have actually looked at one or read the specs. The DS offset is less on the G3, but the NDS is higher. It will be laterally stiff until one or more NDS spokes go slack due to radial loading.

If you aren't interested in using 11spd cassettes you can probably lace the DS 1x heads-in. And/or use heavier spokes on the DS.

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